# Runtime capability boundary

UE4SS is only a possible Companion-local implementation detail. It is not a
feature gate: no SCUM game, database, UE4SS build, or source revision controls
plugin availability.

The Companion declares availability from its server-bound typed ports and
runtime schema probes. Notification and fixed vehicle spawning can use a local
typed transport, but callers never supply a command, socket, credential, path,
or raw transport reply. Vehicle spawning creates only the private
`#spawnvehicle <vehicleCode>` template from the plugin allowlist.

Semantic events come from bounded Run stdout/stderr records. Unknown records
create diagnostics and never produce fabricated events. Run database access is
limited to typed allowlisted projections and safe mutations; DSNs, rows, SQL,
and credentials do not leave Run.